* xcalc and also xclock accept the -title parameter. It's either un-
documented or the ancient docs got lost traveling in the eons. In any
case, instead of having a plain "xcalc" in the title bar, you can have "xcalc
Number Cruncher", for example.

Here's a nice little script that sums it all up, to put in your
/root/my-applications/bin folder under the filename "xcalc.sh"